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   acronym
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  <p>An acronym for the World Wide Web is <strong>
   <acronym title="World Wide Web">WWW</acronym></strong>
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  <p>This file contains <strong>&lt;acronym title=&quot;World Widw Web&quot;&gt;WWW&lt;/acronym&gt;</strong>
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 <p>The 'experimental' Nu Markup Checker flags this as an <strong>ERROR</strong> with the string <strong>
  &quot;Error: The acronym element is obsolete. Use the abbr element instead.&quot;</strong>
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